If you should find one, an A16S back is 4x4 square format centered on the film. It was made for superslides.. Might as well use a A12 back.. Frank Filippone red735i@xxxxxxxxxxxxx From: hasselblad-bounce@xxxxxxxxxxxxx [mailto:hasselblad-bounce@xxxxxxxxxxxxx] On Behalf Of JAMES WILLIAMS Sent: Saturday, August 30, 2008 3:20 PM To: hasselblad@xxxxxxxxxxxxx Subject: [HUG ] A16 back Hello everyone on the list, I'm new to the hasselblad experience. I'm trying to get an outfit together and I was wondering about an A16 back. I know a A24 is for 220, A12 is for 120 and there is a back for 70mm I think. So what is the story on the A16 back. My outfit right now consist of 503CX a 60mm and 80mm lens and 2 A24 backs. I also have a 45 degree viewer. I specialize in landscape and nature photography, any advise. Have a great day James